CN101857072B - Unconditional stability equipped deep-draft floating production platform and offshore installation method thereof - Google Patents
Unconditional stability equipped deep-draft floating production platform and offshore installation method thereof Download PDFInfo
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- CN101857072B CN101857072B CN2010101993085A CN201010199308A CN101857072B CN 101857072 B CN101857072 B CN 101857072B CN 2010101993085 A CN2010101993085 A CN 2010101993085A CN 201010199308 A CN201010199308 A CN 201010199308A CN 101857072 B CN101857072 B CN 101857072B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/005—Equipment to decrease ship's vibrations produced externally to the ship, e.g. wave-induced vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
- B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
- B63B1/14—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration
- B63B2001/145—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently or having means for actively varying hull shape or configuration having means for actively varying hull shape or configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
- B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Abstract
The invention relates to an unconditional stability equipped deep-draft floating production platform and an offshore installation method thereof. The unconditional stability equipped deep-draft floating production platform is characterized by comprising an annular ballast tank at the bottom, a plurality of columns with small cross sections, an annular buoyancy tank at the middle part, a plurality of columns with large cross sections, a drilling machine on the upper part and an oil gas processing module. The ballast tank adopts a permanent fixed ballast mode, and the tank is internally filled with weights to ensure that the buoyant center of the platform is higher than the gravity center; the columns with large and small cross sections are uniformly arranged on the buoyancy tank and the ballast tank respectively, and the lower parts thereof are respectively integrated with the buoyancy tank and the ballast tank; each column with a large cross section is provided with a central pore canal axially; a lower part in the central pore canal is provided with a chopping board connection structure with a groove; after the construction is completed, the columns with small cross sections are inserted into and pass through the central pore canals of the columns with large cross sections correspondingly; the platform is in a folding state; each column with a large cross section is provided with a group of mooring cables; the drilling machine and the oil gas processing module are installed in the construction area; the equipment is entirely transported to the installation site by adopting a dry haulage or wet haulage method and then is installed. The platform in the invention can be applied to deepwater oil and gas exploitation in the condition of threatening marine environment.
Description
Technical field
The present invention relates to a kind of deep water floating production platform and offshore installation method thereof; Particularly be used for deep water marine oil and gas exploitation about a kind of; Drag or two kinds of transportation modes of floating certainly haul but the whole barge of implementation platform is dried; Installation need not large-scale floating crane, can adopt the unconditional stability equipped deep-draft floating production platform and the offshore installation method thereof of dry tree.
Background technology
Along with the marine oil and gas exploitation marches to deep water, traditional fixed type oil production platform can not satisfy the needs of ocean deepwater oil and gas development, and floating production platform becomes the main equipment of present ocean deepwater oil and gas development.In recent years, produce the multiple floating production platform that is used for the ocean deepwater oil and gas development, be widely used in deep water hydrocarbon field exploitation all over the world, for example semisubmersible platform, deep draft open side type platform and tension leg platform.Above-mentioned every kind of platform all has its merits and faults: it hangs down that to swing exercise performance relatively poor semisubmersible platform, must adopt wet-type christmas tree when being used for as deep water hydrocarbon Development and Production platform, and the wet-type christmas tree technical sophistication, costs an arm and a leg; Deep draft open side type platform has good exercise performance; Can use dry tree, but its have the platform upper and lower must split marinely install, marine install with is connected that operation is very complicated, the Texas deck area is little, design difficulty greatly and shortcoming such as oil gas treatment facility difficult arrangement; Tension leg platform has good exercise performance equally, but because it uses tension leg to connect with seafloor foundation, its cost increases sharply with depth of water increase.
To with the upper mounting plate merits and faults; Ocean engineering circle has proposed multiple novel platform scheme, new ideas; But the sea of these new ideas and present existing traditional floating platform scheme is installed all very complicated, needs to adopt main equipment could accomplish its marine installation, and is with high costs.
Summary of the invention
To the problems referred to above; The present invention proposes that a kind of exercise performance is good, and floor space is big, and it is high to build integrated level; Can realize that barge is dried and drag or two kinds of transportation modes of floating certainly haul; The marine installation need not large-scale floating crane, can adapt to different oil recovery patterns such as dry type oil recovery, wet type oil recovery and dried wet compound type oil recovery, and cost increases insensitive unconditional stability equipped deep-draft floating production platform and offshore installation method thereof for the depth of water.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of unconditional stability equipped deep-draft floating production platform; It is characterized in that: it comprises a base circle ballast tank; The some small bore columns that are positioned on the said annular ballast compartment; A the middle part identical or close annular buoyancy tank with said annular ballast compartment shape, identical with said small bore column quantity and be positioned at the heavy in section column on the said annular buoyancy tank, and a top rig and an oil gas processing module that is positioned at column top, said heavy in section; Said annular ballast compartment adopts permanent fixation ballast mode, fills weight in the cabin, guarantees that the flat-bed centre of buoyancy is higher than center of gravity; Said heavy in section column is evenly arranged on the said annular buoyancy tank, and its underpart and said annular buoyancy tank are connected as a single entity; Every said heavy in section column axially is provided with a medium pore canal, and the bottom is provided with the chopping block connection structure of a band groove in the said medium pore canal; Corresponding with said heavy in section stud, said small bore column is evenly arranged on the said annular ballast compartment, and its underpart and said annular ballast compartment are connected as a single entity; Platform construction is accomplished in the medium pore canal that the said small bore column correspondence in back is inserted into said heavy in section column and is passed, and said small bore column connects as one through voussoir, bolt or latch and said heavy in section column, and platform is in folded state at this moment; Said small bore column top is provided with the inverted cone structure; Be provided with one group of mooring fast on the every said heavy in section column, and adopt traditional anchorage style that said mooring fast is connected to the seabed anchor point; Said rig and oil gas processing module are installed building the place, adopt and driedly drag or wetly launch installation after dragging mode integral body to be transported to the fabricating yard.
Said annular ballast compartment adopts the equilateral polygon structure, wherein between the bottom be provided with the vertical plate that swings that is connected as a single entity with it, and said hanging down swing perforate in the middle of the plate, and the production of hydrocarbons standpipe/drilling riser pipe that is communicated with said rig and oil gas processing module is therefrom passed.
Said annular buoyancy tank is roomy box type construction; Its sharp corner rounding; And be provided with in the twice vertical watertight bulkhead in the said annular buoyancy tank inner space of said floating box structure is divided into three parts; The walkway is established in space during twice are said between the vertical watertight bulkhead, and the space in the vertical watertight bulkhead outside was divided into a plurality of watertights cabin during twice were said.
Said heavy in section column is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure, and the side arrangement of every said heavy in section column has the helix side plate.
Said mooring fast adopts traditional anchor chain mode, anchor chain-cable-anchor chain array mode or full nylon cable mode.
A kind of offshore installation method of above-mentioned unconditional stability equipped deep-draft floating production platform; It may further comprise the steps: 1) adopt barge dried drag or floating certainly haul mode with the platform haul to the place of erection; The offload platform in the place of erection, platform is in free floating condition; 2) annular ballast compartment part ballast subsequently, platform and integrally sinks; 3) when the weight of annular ballast compartment and ballast water and small bore column during greater than its suffered buoyancy; Annular ballast compartment is sunk; The small bore column is progressively transferred under slave mode from the column of heavy in section; Annular ballast compartment relies on the inverted cone structure at small bore column top to hang on the below of annular buoyancy tank, and the buoyancy that whole flat relies on annular buoyancy tank and heavy in section column to provide swims in the water; 4) use loop wheel machine that the liquid pressing connecting device is put to the small bore column and column junction, heavy in section through medium pore canal; Carry out liquid pressing; Make the exterior panel of small bore column and column junction, heavy in section produce plastic deformation through hydraulic coupling; It is clamp-oned in the groove of junction, column bottom, heavy in section chopping block connection structure, make the two-part structure full strength connect as a whole structure; 5) accomplish the small bore column and the heavy in section column be connected after, ultrasonic inspection junction installation quality, qualified back annular ballast compartment ballast be to design value, installation anchoring system and riser systems, all erection works of completion platform.
The present invention is owing to take above technical scheme; It has the following advantages: 1, flat-bed annular ballast compartment of the present invention adopts permanent fixation ballast mode; Fill iron sand or other weight in the cabin, be higher than center of gravity in the centre of buoyancy at any time with the assurance platform, thereby make platform keep darker drinking water state in-service; Not only realized the unconditional stability of platform in marine environment, and guaranteed that flat-bed stability and rough water quality satisfy operating needs.Simultaneously, the more traditional deep draft open side type of draft of the present invention platform is little, can effectively reduce platform construction, transportation and installation difficulty; The more traditional semi-submerged platform column of platform column diameter of the present invention is little, can effectively reduce to act on flat-bed surface wave load.2, platform of the present invention adopts folding structure; Upper chunk can be installed building the place, under folded state, adopts dried drag or floating certainly haul mode is transported to the place of erection, does not need the large-scale floating crane cooperation; Can realize marine easy installation, greatly reduce the platform cost of installation.3, flat-bed bottom small bore column of the present invention and annular ballast compartment are connected as a single entity; Heavy in section, top column and annular buoyancy tank connect as one, and annular buoyancy tank can also provide enough buoyancy for platform as the platform and integrally supporting construction; Simultaneously can also make the platform bottom section become a general frame structure; Thereby improve platform and integrally intensity, effectively resistant function is given the platform and integrally structure in the flat-bed environmental load with the loading transfer that single upright column suffers.Simultaneously; Annular ballast compartment and floating box structure can effectively transmit because wave and platform overbalance load the interaction force between each column that is caused; Therefore platform has good integral structure rigidity and intensity; Can effectively reduce the tired focus stress that platform suffers connecting joint under the environmental load condition, the fatigue life of improving the platform and integrally structure, improve the ability that platform adapts to abominable marine environment.4, heavy in section, top of the present invention column is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure, can effectively reduce wave to the flat-bed gradeability.Arrange the helix side plate on the every heavy in section column, swash response with the platform whirlpool that effective inhibition ocean current is caused.5, the middle lower portion of annular ballast compartment of the present invention is provided with the vertical plate that swings that is connected as a single entity with it; Can effectively increase the vertical added mass that swings of platform and swing damping with hanging down; Improve the vertical exercise performance that swings of flat-bed; Christmas tree can be positioned on the platform deck, thereby makes platform can use dry tree to carry out oil-gas mining, reduces the oil producing operation cost greatly; Simultaneously, according to the needs of oilfield development model, platform of the present invention also can adopt subsea wellhead, standpipe tieback in flat-bed wet type oil production method, the dried wet compound type oil production method that perhaps adopts dry type or wet type to recover the oil for the different oil wells in oil field.6, floating box structure of the present invention is roomy box type construction, and its sharp corner rounding is to reduce the gradeability of wave.Vertical watertight bulkhead is set in the floating box structure in the twice its inner space is divided into three parts, guarantee structural redundancy degree and the platform stability of floating box structure after impaired, to guarantee platform safety.The walkway is established in space in the twice between the vertical watertight bulkhead, the platform operations personnel is arrived so that maintenance.The space in the vertical watertight bulkhead outside is divided into a plurality of watertights cabin in the twice, can be used as fuel oil/fresh water tank, equipment compartment and variable ballast tank.7, the present invention adopts multiple spot anchoring locate mode location, and its cost increases insensitive to the depth of water, can be applicable to the exploitation of deep water and ultra deep water marine oil and gas.When platform need be shifted, can adopt traditional approach that mooring fast is packed up, platform transfer is in place to other place, can practice thrift investment, increase economic efficiency.8, the present invention is owing to adopt many pillar constructions, and top rig and oil gas processing module floor space are big, top oil gas treatment facility is arranged more optimized, and improves the safety that platform operating efficiency and top facility are arranged.In sum, platform motion function admirable of the present invention has unconditional stability, and it is wide to adapt to the operating water depth scope, and overall construction intensity is good, and is in light weight, and laid down cost is low, can be applicable to the deep water hydrocarbon exploitation under the abominable marine environment condition.
Description of drawings
Fig. 1 is the present invention's four column platform folded state scheme drawings
Fig. 2 is the present invention's four column platform folded state column connection mode scheme drawings
Fig. 3 is the partial enlarged drawing of Fig. 2
Fig. 4 is the cross sectional representation of floating box structure of the present invention
Fig. 5 is the structural representation of the present invention's four column platform annular ballast compartment
Fig. 6 is that the present invention's four column platforms launch to install the back scheme drawing
Fig. 7 is the structural representation of the present invention's four column platform octagons annular buoyancy tank
Fig. 8 is the structural representation of the present invention's four column platform octagon annular ballast compartment
Each stage form scheme drawing when Fig. 9 a～f is the installation of platform of the present invention sea
Figure 10 a～d is that liquid pressing of the present invention connects the deformation process scheme drawing
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
As shown in Figure 1; Platform of the present invention comprises a square base circle ballast tank 1; Four small bore columns 2 (, being not limited to this) that are positioned on the annular ballast compartment 1 only as example, a middle part annular buoyancy tank 3 identical or close with annular ballast compartment 1 shape; Four heavy in section column 4 (, being not limited to this) and a top rig and oil gas processing modules 5 that are positioned at heavy in section column 4 tops that are positioned on the annular buoyancy tank 3 only as example.
Like Fig. 1～shown in Figure 3, four heavy in section columns 4 are evenly arranged in four angle point places of annular buoyancy tank 3, and its underpart and annular buoyancy tank 3 are connected as a single entity.Heavy in section column 4 is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure, can effectively reduce wave to the flat-bed gradeability.The side arrangement of every heavy in section column 4 has helix side plate 6, swashs motion with the platform whirlpool that effective inhibition ocean current is caused.Every heavy in section column 4 axially is provided with a medium pore canal 7, and the bottom is provided with the chopping block connection structure 8 of a band groove in the medium pore canal 7.
As shown in Figure 4, annular buoyancy tank 3 is roomy box type construction, and its sharp corner rounding is to reduce the gradeability of wave.Annular is provided with that vertical watertight bulkhead 9 is divided into three parts with its inner space in the twice in the buoyancy tank 3, to guarantee the annular buoyancy tank 3 structural redundancy degree after impaired, guarantees platform safety.Walkway 10 is established in space in the twice between the vertical watertight bulkhead 9, the platform operations personnel is arrived so that maintenance.The space in vertical watertight bulkhead 9 outsides is divided into a plurality of watertights cabin 11 in the twice, can be used as fuel oil/fresh water tank, equipment compartment and variable ballast tank.
Like Fig. 2, shown in Figure 5, corresponding with heavy in section column 4 positions, four small bore columns 2 are evenly arranged in four angle point places of annular ballast compartment 1, and its underpart and annular ballast compartment 1 are connected as a single entity.Small bore column 2 correspondences are inserted in the medium pore canal 7 of heavy in section column 4 and pass, and small bore column 2 connects as one with heavy in section column 4 through voussoir, bolt or latch 12, and this moment, platform was in folded state.Small bore column 2 tops are provided with inverted cone structure 13.
As shown in Figure 6, the present invention adopts multiple spot anchoring locate mode location, is provided with one group of mooring fast 15 on the every heavy in section column 4, and adopts traditional anchorage style that mooring fast 15 is connected to the seabed anchor point.Mooring fast 15 can adopt traditional anchor chain mode, anchor chain-cable-anchor chain array mode or full nylon cable mode.When platform need be shifted, can adopt traditional approach that mooring fast 15 is packed up, other place of platform transfer is in place, can practice thrift investment, increase economic efficiency.
In the foregoing description, annular ballast compartment 1 also can adopt the octagon structure with annular buoyancy tank 3, and small bore column 2 and heavy in section column 4 are evenly arranged in the middle part (like Fig. 7, shown in Figure 8) on annular ballast compartment 1 and annular buoyancy tank 3 every limits respectively.Equally; Annular ballast compartment 1 also can adopt positive triangle or regular hexagon structure with annular buoyancy tank 3; Be respectively arranged with three small bore columns 2 and heavy in section column 4 on the annular ballast compartment 1 of positive triangle structure and the annular buoyancy tank 3, and small bore column 2 and heavy in section column 4 are positioned at the angle point place of annular ballast compartment 1 and annular buoyancy tank 3; Also be respectively arranged with three small bore columns 2 and heavy in section column 4 on the annular ballast compartment 1 of regular hexagon structure and the annular buoyancy tank 3, and small bore column 2 and heavy in section column 4 are positioned at the middle part on annular ballast compartment 1 and annular buoyancy tank 3 every limits.Positive triangle, regular hexagon, octagon flat-bed integral structure and square flat-bed structural similitude are so repeat no more.
In the foregoing description, top rig and oil gas processing module 5 are installed in the platform construction place, compare with at sea rigging up and oil gas processing module 5, cost of installation reduces greatly.Simultaneously, rig and oil gas processing module 5 can select for use conventional rig of the prior art and oil gas treatment facility to carry out equipment disposition according to the difference of oilfield development model, can reduce the technical risk that the present invention uses greatly.
Platform of the present invention is in folded state after building place construction completion, this moment, annular buoyancy tank 3 placed on the annular ballast compartment 1 platform overall height lower (as shown in Figure 1) fully.Flat-bed offshore installation method of the present invention may further comprise the steps:
1, adopt barge dried drag or floating certainly haul mode with the platform haul to the place of erection, the offload platform in the place of erection, platform are in free floating condition (shown in Fig. 9 a, Fig. 9 b).
2, annular ballast compartment 1 part ballast subsequently, platform and integrally sink (shown in Fig. 9 c).
3, when annular ballast compartment 1 and when wherein the weight of ballast water and small bore column 2 is greater than annular ballast compartment 1 suffered buoyancy; Annular ballast compartment 1 is sunk; Small bore column 2 is progressively transferred under slave mode from heavy in section column 4; Annular ballast compartment 1 relies on the inverted cone structure 13 at small bore column 2 tops to hang on the below of annular buoyancy tank 3, and whole flat relies on annular buoyancy tank 3 and the buoyancy that heavy in section column 4 provides to swim in (shown in Fig. 9 d, 9e) in the water.
4, usage platform self loop wheel machine is put liquid pressing connecting device 16 to the small bore column 2 and heavy in section column 4 junctions through medium pore canal 7; Carry out liquid pressing; Make the small bore column 2 and the exterior panel of heavy in section column 4 junctions produce plastic deformation through hydraulic coupling; It is clamp-oned in the groove of junction, heavy in section column 4 bottom chopping block connection structure 8, make the two-part structure full strength connect as a whole structure (shown in Fig. 9 e).Liquid pressing connects deformation process can be divided into following four-stage:
The A stage; Be the starting stage; Liquid pressing connecting device 16 is put into connection location; The upper and lower seal ring 17,18 of liquid pressing connecting device 16 is sealed into a confined space 19 with small bore column 2 corresponding connection locations, and confined space 19 fills highly pressurised liquid, and the exterior panel of small bore column 2 begins distortion (shown in Figure 10 a);
The B stage increases fluid pressure, and the exterior panel of small bore column 2 begins plastic deformation, the groove wedge angle (shown in Figure 10 b) of the exterior panel contact chopping block connection structure 8 of small bore column;
The C stage increases fluid pressure, and the exterior panel of small bore column 2 continues plastic deformation, the bottom portion of groove (shown in Figure 10 c) of the exterior panel contact chopping block connection structure 8 of small bore column 2;
The D stage; Increase fluid pressure, the exterior panel of small bore column 2 continues plastic deformation, removes the bottom portion of groove sharp corner of chopping block connection structure 8; The chopping block connection structure 8 complete closed contacts of the exterior panel of small bore column 2 and heavy in section column 4 bottoms connect as one (shown in Figure 10 d).
5, accomplish small bore column 2 and heavy in section column 4 be connected after, ultrasonic inspection junction installation quality, qualified back annular ballast compartment 1 ballast be to design value, installation anchoring system and riser systems, completion all erection works of platform (shown in Fig. 9 f).
The present invention only describes with the foregoing description; The structure of each parts, the position is set and connects and all can change to some extent; On the basis of technical scheme of the present invention; All improvement and equivalents of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (8)
1. unconditional stability equipped deep-draft floating production platform; It is characterized in that: it comprises a base circle ballast tank; The some small bore columns that are positioned on the said annular ballast compartment; A the middle part identical or close annular buoyancy tank with said annular ballast compartment shape, identical with said small bore column quantity and be positioned at the heavy in section column on the said annular buoyancy tank, and a top rig and an oil gas processing module that is positioned at column top, said heavy in section; Said annular ballast compartment adopts permanent fixation ballast mode, fills weight in the cabin, guarantees that the flat-bed centre of buoyancy is higher than center of gravity;
Said heavy in section column is evenly arranged on the said annular buoyancy tank, and its underpart and said annular buoyancy tank are connected as a single entity; Every said heavy in section column axially is provided with a medium pore canal, and the bottom is provided with the chopping block connection structure of a band groove in the said medium pore canal;
Corresponding with said heavy in section stud, said small bore column is evenly arranged on the said annular ballast compartment, and its underpart and said annular ballast compartment are connected as a single entity; Platform construction is accomplished in the medium pore canal that the said small bore column correspondence in back is inserted into said heavy in section column and is passed, and said small bore column connects as one through voussoir, bolt or latch and said heavy in section column, and platform is in folded state at this moment; Said small bore column top is provided with the inverted cone structure;
Be provided with one group of mooring fast on the every said heavy in section column, and adopt traditional anchorage style that said mooring fast is connected to the seabed anchor point;
Said rig and oil gas processing module are installed building the place, adopt and driedly drag or wetly launch installation after dragging mode integral body to be transported to the fabricating yard.
2. a kind of unconditional stability equipped deep-draft floating production platform as claimed in claim 1; It is characterized in that: said annular ballast compartment adopts the equilateral polygon structure; The bottom is provided with the vertical plate that swings that is connected as a single entity with it wherein; And said hanging down swung the middle perforate of plate, and the production of hydrocarbons standpipe/drilling riser pipe that is communicated with said rig and oil gas processing module is therefrom passed.
3. a kind of unconditional stability equipped deep-draft floating production platform as claimed in claim 1; It is characterized in that: said annular buoyancy tank is roomy box type construction; Its sharp corner rounding; And be provided with in the twice vertical watertight bulkhead in the said annular buoyancy tank inner space of said floating box structure is divided into three parts, the walkway is established in the space during twice are said between the vertical watertight bulkhead, and the space in the vertical watertight bulkhead outside was divided into a plurality of watertights cabin during twice were said.
4. a kind of unconditional stability equipped deep-draft floating production platform as claimed in claim 2; It is characterized in that: said annular buoyancy tank is roomy box type construction; Its sharp corner rounding; And be provided with in the twice vertical watertight bulkhead in the said annular buoyancy tank inner space of said floating box structure is divided into three parts, the walkway is established in the space during twice are said between the vertical watertight bulkhead, and the space in the vertical watertight bulkhead outside was divided into a plurality of watertights cabin during twice were said.
5. like claim 1 or 2 or 3 or 4 described a kind of unconditional stability equipped deep-draft floating production platforms; It is characterized in that: said heavy in section column is cylinder, square column, polygon rhombus column or nearly cylindrical shell structure, and the side arrangement of every said heavy in section column has the helix side plate.
6. like claim 1 or 2 or 3 or 4 described a kind of unconditional stability equipped deep-draft floating production platforms, it is characterized in that: said mooring fast adopts traditional anchor chain mode, anchor chain-cable-anchor chain array mode or full nylon cable mode.
7. a kind of unconditional stability equipped deep-draft floating production platform as claimed in claim 5 is characterized in that: said mooring fast adopts traditional anchor chain mode, anchor chain-cable-anchor chain array mode or full nylon cable mode.
8. offshore installation method like the described unconditional stability equipped deep-draft floating production platform of one of claim 1～7, it may further comprise the steps:
1) adopt barge dried drag or floating certainly haul mode with the platform haul to the place of erection, the offload platform in the place of erection, platform is in free floating condition;
2) annular ballast compartment part ballast subsequently, platform and integrally sinks;
3) when the weight of annular ballast compartment and ballast water and small bore column during greater than its suffered buoyancy; Annular ballast compartment is sunk; The small bore column is progressively transferred under slave mode from the column of heavy in section; Annular ballast compartment relies on the inverted cone structure at small bore column top to hang on the below of annular buoyancy tank, and the buoyancy that whole flat relies on annular buoyancy tank and heavy in section column to provide swims in the water;
4) use loop wheel machine that the liquid pressing connecting device is put to the small bore column and column junction, heavy in section through medium pore canal; Carry out liquid pressing; Make the exterior panel of small bore column and column junction, heavy in section produce plastic deformation through hydraulic coupling; It is clamp-oned in the groove of junction, column bottom, heavy in section chopping block connection structure, make the two-part structure full strength connect as a whole structure;
5) accomplish the small bore column and the heavy in section column be connected after, ultrasonic inspection junction installation quality, qualified back annular ballast compartment ballast be to design value, installation anchoring system and riser systems, all erection works of completion platform.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101993085A CN101857072B (en) | 2010-06-09 | 2010-06-09 | Unconditional stability equipped deep-draft floating production platform and offshore installation method thereof |
| US13/702,302 US8733266B2 (en) | 2010-06-09 | 2010-12-02 | Integrative deep draft floating production platform with unconditional stability and offshore installation method thereof |
| PCT/CN2010/001948 WO2011153677A1 (en) | 2010-06-09 | 2010-12-02 | Integrally equipped heavy draught floating type oil production platform with unconditional stability and offshore installation method thereof |
| US14/271,327 US9032896B2 (en) | 2010-06-09 | 2014-05-06 | Grouting and welding combined connection joint applied to a deepwater floating type platform and an offshore installation method thereof |
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| CN2010101993085A CN101857072B (en) | 2010-06-09 | 2010-06-09 | Unconditional stability equipped deep-draft floating production platform and offshore installation method thereof |
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| US (1) | US8733266B2 (en) |
| CN (1) | CN101857072B (en) |
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Also Published As
| Publication number | Publication date |
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| US8733266B2 (en) | 2014-05-27 |
| WO2011153677A1 (en) | 2011-12-15 |
| CN101857072A (en) | 2010-10-13 |
| US20130092069A1 (en) | 2013-04-18 |
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